Up to 0.2 parts per million, or ppm, of volatile organic compounds were detected at multiple locations in Port Arthur and Nederland on Wednesday, according to the latest handheld monitoring equipment data from the Texas Commission on Environmental Quality released Thursday.

Handheld equipment was used to test for lower explosive limit, VOCs, hydrogen sulfide, carbon monoxide, sulfur dioxide, benzene, 1,3 butadiene and oxygen.

None of the locations tested Thursday recorded any amount of VOC. The other substances recorded 0 ppm in all locations (or no data for carbon monoxide in some locations) Wednesday and Thursday.

Levels of 1 milligram per cubic meter or more are considered high, according to Tecam Group, an environmental technology group.

Short-term exposure to high concentrations of VOCs can cause eye, nose and throat irritation, shortness of breath, headaches and nausea, according to the TCEQ.

Locations tested with 0.2 ppm Wednesday, according to the latest data:

• Port Arthur — 2955 58^th St.

Locations tested with 0.1 ppm Wednesday:

• Port Arthur — 2813 Manning St., 5997 Hazel Ave., 3150 60^th St., 6207 Diamond Ave., 6400 Diamond Ave., 2230 Lavender St., 2399 Lavender St., 5900 Ray Ave., 2441 61^st St., 6224 Garnett Ave., 2764 61^st St., 2946 61^st St., 2902 62^nd St.
• Nederland — 104 2^nd, 3113 Madison, 1^st and Chicago.